Improvement in locks for fire-arms



M. KAUFMANN & J. WARNANT. Look for Pire-Armsf No. 212,473. Patented Feb. 18, 1879.

Witnesses,

N-PETERB, PHOTD'UTHOGRAFNER. WASHINGTON. D. C.

UNITED STA ES PATENT OFFICE.

MICHAEL KAUFMANN, OF LONDON, GREAT BRITAIN, AND J ULIEN WABNANT, OF HOGNEE, BELGIUM SAID WABNANT ASSIGNOB TO SAID KAUFMANN.

IMPROVEMENT IN LOCKS FOR FIRE-ARMS.

Specification forming part of Letters Patent No. 212,473, "dated February 18, 187 9; application filed January 10, 1879.

1'0 all whom 'it may concern:

Be it known that we, MICHAEL KAUFMANN, of the city of London, Kingdom of Great Britain, and J ULIEN WARNANT, of Hogne, Gommune of Gheratte, Kingdom of Belgium, have invented certain new and useful Improvements in Fire-Arms 5 and we hereby declare the same to be fully, clearly, and exactly described as follows, reference being had to the accompanying drawings, in which-- I Figure 1 is 'a plan view of the lock complete; Figs. 2, 3, 4, 5, and 6, respectively, similar views of the trigger, arm, hammer, mainsprin g, and pawl.

Our present invention relates to looks for firearms, and, while it is adapted for use in any form of percussion fire-arm, it is especially designed to be applied to revolvers; and our said 1nvent1on consists in certain improve ments upon that described in Letters Patent,

tation and disposition in the lock are the same.

The trigger O is perforated at c for the pivot, has a lug, c, for engagement with the cylinder when the weapon is full-cocked, and a proj ection, 1), with the pawl-pivot hole (1 and'notch d. The hammerA has a pivot'hole, B, lug b, with notch b to engage with the trigger, tailpiece b, and bearing a for the mainspring,

shown and described in the patents referred to.

The pawl H is recessed at I, the bottom of the recess being formed in two inclines, 6, whose apex t is forward of the pivot h. The latter is adapted to enter the hole (1' in the trigger. A lug, h, projects from the lower end of the pawl, subserving the double function of locking and self-cocking the hammer.

The mainspring F engages at f with the hammer, and its lower leaf, f, serves to effect the rebound of the latter. Instead of en gaging directly with the pawl, however, as in the patented invention, the arm G of the mainspring terminates in a bearing, g, which engages with the arm E, that constitutes the salient feature of our present invention. This.

piece,'which we termthe arm, is represented in Fig. 3 of the drawings. It consists of a suitable piece of steel having a hole, 6, for the hammer-pivot, a lug, 0, upon which the end g of the mainspring bears, and a projection, e, which rests upon the incline t" of the pawl. I

It may here be remarked that all of the parts of the lock are drawn to a scale in the accompanying drawings, and are therefore of precisely the proper relative size and shape.

The piece or arm E subserves an important function in the lock; it equalizes the triggerpull in self-cocking the weapona most important end, if accuracy of aim may be considered an object-and it more efliciently regulates the bearing of the pawl upon the ratchetpiece of the cylinder.

The operation of the lock is as follows: Upon cooking the weapon in the usual way, the lug b of the hammer engages with the end D of the trigger, which carries up the pawl, and with it the arm, compressing the mainspring. As the trigger is retracted the notches d b" come out of engagement and the hammer falls. Upon releasing the trigger the pressure of the mainspring, delivered through the medium of the arm and paw], carries the trigger forward and the pawl downward until its ing 71. passes the projection I) of the hammer, when the pawl tilts forward, owing to the arrange ment of the bearing 2", and coming under the projection 11 looks the hammer. Ooincidently with the descent of the pawl, the end f of the mainsprin g coming to bear upon the tail-piece of the hammer effects its rebound. It is clear that the hammer cannot, by any possibility, be made to reach a cartridge without being first raised to full-cock, by reason of the bringing up of the trigger against the main frame a; of the weapon.

It will have been made evident from the foregoing description of the parts, not only that the lock is double-actin g, but also how it operates as a" self-cooker, rendering a further description unnecessary.

When used in a fire-arm not a revolver, of course the pawl would be a superfluity, and might either be dispensed with entirely, the arm being made to bear upon a suitable projection on the trigger, or, if the self-cocking feature is desired, the pawl might be simply cut 011' just above its pivot for the trigger.

The arm is in efi'ect a bent lever, and its operation in equalizing the trigger-pull depends upon the relative acting distances of the power and weighttfrom the hammer-pivot. What we claim as new, and desire to secure by Letters Patent, is- 

